#1B185A#1B185A

#1B185A is a dark, moderate blue. Relative luminance 0.016; OKLCH L 26.4% C 0.114 H 277.2°. Best body text is #FFFFFF at 15.85:1 contrast (WCAG AA passes).

Color values

HEX	#1B185A
RGB	rgb(27, 24, 90)
HSL	hsl(243, 58%, 22%)
HSV	hsv(243, 73%, 35%)
CMYK	cmyk(70%, 73.3%, 0%, 64.7%)
CIE-LAB	lab(13.38, 24.48, -39.12)
CIE-LCH	lch(13.38, 46.15, 302.04°)
OKLab	oklab(26.36% 0.0143 -0.1129)
OKLCH	oklch(26.36% 0.114 277.2)
XYZ	xyz(2.6235, 1.6242, 9.8461)
Luminance	0.0162 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B185A #575A18

analogous

#18365A #1B185A #3C185A

triadic

#1B185A #5A1B18 #185A1B

tetradic

#1B185A #5A1836 #575A18 #185A3C

square

#1B185A #5A1836 #575A18 #185A3C

split-complementary

#1B185A #5A3C18 #365A18

monochromatic

#070618 #0D0B2A #1B185A #29258A #3832BB

Accessibility & contrast

On white

15.85

#1B185A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.32

#1B185A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B185A

15.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B185A	#FFFFFF	#000000	##FFFFFF
##1B185A	1.00	15.85	1.32	15.85
#FFFFFF	15.85	1.00	21.00	1.00
#000000	1.32	21.00	1.00	21.00
##FFFFFF	15.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00255C

Deuteranopia (green-blind)

#001F59

Tritanopia (blue-blind)

#002A36

Achromatopsia (no color)

#222222

Design tokens & code

CSS

--color: #1b185a;
/* rgb */ color: rgb(27, 24, 90);
/* oklch */ color: oklch(26.4% 0.114 277.2);

Tailwind

colors: {
  custom: {
    50: '#615589',
    500: '#1b185a',
    950: '#000000',
  },
}

SCSS

$custom: #1b185a;
$custom-light: #615589;
$custom-dark: #000000;

JSON

{
  "hex": "#1b185a",
  "rgb": {
    "r": 27,
    "g": 24,
    "b": 90
  },
  "hsl": {
    "h": 242.727,
    "s": 57.895,
    "l": 22.353
  },
  "oklch": {
    "l": 0.26355,
    "c": 0.11379,
    "h": 277.2
  },
  "luminance": 0.01624
}

Semantic roles & 50–950 ramp

primary

#1B185A

secondary

#8D913D

accent

#E147DA

background

#F6F5F8

surface

#EBE8F0

border

#C6C4CB

text

#05030C

muted

#7A787D

Preview Lab

Preview with #1B185A

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →